Deductions & credits

Hi @DaveF1006 - I made the mistake and filed 2020 tax returns with the wrong numbers due to the TT bug. Give your recommendation, would your solution work based on refinancing a jumbo loan in 2020 and changing lenders?  Also, since my loan originated prior to the tax changes in Dec 2019, how do I correctly make this note so that I am not limited to deducting only up to a $750k mortgage balance?  Thanks so much.